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Red-headed flea beetle – Adult emergence beginning any day now

Please refer to this timeline of pest development compiled by Tim Waller in communication with Brain Kunkel (Unv. Del) and Danny Lauderdale (NC State)

• Contains material selection and timing, along with regime information and considerations

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Boxwood Blight Alert – Infection Potential (Saturday) 5/27

Boxwood Blight Risk Assessment as of 5/24/2022
Region	Location	CODE	24-May	25-May	26-May	27-May	28-May	29-May
Southern	Upper Deerfield	NJ50	Very Low	Very Low	Low	High Risk	Very Low	Very Low
Central	Howell / Freehold	NJ10	Very Low	Very Low	Low	Infection Risk	Very Low	Very Low
Northern	High Point	NJ59	Very Low	Very Low	Very Low	Infection Risk	Very Low	Low
Check local boxwood blight risk here (CLICK HERE – input your area code – select closest weather station – check 7-14 prediction – click on graph / table)

 

Refer to the most recent Alert for more information – CLICK HERE

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Pest Scouting – Please refer to these documents for a full listing of insects pests for your area corresponding to growing degree-days (GDDs). 

• Nursery and Landscape Pest Scouting Guide 2022 PDF (note this contains conifer pests as well)
• Conifer Pest Scouting Guide 2022 PDF

Contact if seeing insects at different times: twaller@njaes.rutgers.edu (or call the Cumberland County Extension Office – 856-451-2800)

The following key groups of pests will be active, vulnerable, or otherwise treatable during the next month throughout most of NJ. Here, bagworms, scale insects and borers with key life stage events during the 350-1500 GDD timeframe are discussed. Note there are many other insect pests present this time of year so please view the pest scouting guides above for your particular needs.

Projected GDD50 accumulation as of 5/24/2022 (USPEST)						Note: Growing degree-day values utilize daily average air temperatures with a minimum temperature threshold (a.k.a. ‘base’) of 50F = GDD50 (max. temp. threshold set at 95F). These values are accumulated from a biofix date, such as January or March 1st in the NE USA. Provided GDD50 are scouting ranges and should be truthed.
Region	Location	Station	24-May	1-Jun	1-Jul
South	Upper Deerfield	NJ50	488	638	1358
Central	Howell / Freehold	NJ10	426	551	1203
North	High Point	NJ59	288	387	909
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG)

Refer to this post “Obtaining your local growing degree-days” for additional information 

BAGWORMS (600-900 GDD) (Bagworm hatch prediction as of 5/24/22 – now until July 14 (Southern NJ (NJ50)))
Crop type	Common Name	Scientific Name	GDD Min (50F)	GDD Max (95F)	Reference	Developmental / Target Stage
Conifer mostly, many minor hosts	Bagworm	Thyridopteryx ephemeraeformis	600	900	RU	Larvae (early instars) – ONLY CONTROL WINDOW

Refer to this post for additional information on Bagworms

BORER Insect Activity for 350 – 1500 GDD (Now until ~July 1 in Southern NJ (NJ50))
Crop type	Common Name	Scientific Name	GDD Min (50F)	GDD Max (95F)	Reference	Developmental / Target Stage
Malus, Prunus, many	Lesser peach tree borer	Synanthedon pictipes	350	375	4	Adult flight, egg laying
Dogwood, apple, pecan, elm, hickory, willow	Dogwood borer	Synanthedon scitula	350	850	4	adults, eggs, caterpillars
Birch	Bronze Birch Borer	Agrilus anxius	440	880	RU	Adults (egg laying)
Malus, Prunus, many	Peach Tree Borer	Synanthedon sp.	500	600	RU	Adults – emerge (1st treatment both types)
Rhododendron	Rhododendron borer	Synanthedon rhododendri	509	696	RU	Adults emerge
Malus, Prunus, many	Greater peach tree borer	Synanthedon exitiosa	575	710	4	Adult emergence
Many	Roundheaded appletree borer	Saperda candida	802	1129	RU	Adults
Ash	Emerald ash borer	Agrilus planipennis	1000	1200	4	Peak adult activity
Malus, Prunus, many	Peachtree borer	Synanthedon sp.	1500	1800	RU	Larvae Treatment
Many	Roundheaded apple tree borer	Saperda candida	1514	1798	5	Typical treatment window
Conifer	Nantucket tip moth	Rhyacionia frustrana	1514	1917	RU	Adults 2nd generation

Click here – “Identifying Clearwing Moth Borers in Pheromone Traps” or “Differentiating the Common Wood Borers of Ash Trees”

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